TY  - BOOK
AU  - Bridson Martin R
AU  - Haefliger Andre
TI  - Metric spaces of non-positive curvature
SN  - 978-3-540-64324-9
U1  - 514.32 
PY  - 1999///
CY  - Berlin
PB  - Springer-Verlag
KW  - Differential geometry
KW  - Metric spaces
ER  -